1139889 has 4 divisors (see below), whose sum is σ = 1519856. Its totient is φ = 759924.

The previous prime is 1139869. The next prime is 1139909. The reversal of 1139889 is 9889311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9889311 = 3 ⋅3296437.

It is an interprime number because it is at equal distance from previous prime (1139869) and next prime (1139909).

It is not a de Polignac number, because 1139889 - 2¹⁷ = 1008817 is a prime.

It is a super-3 number, since 3×1139889³ = 4443333826009357107, which contains 333 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1139819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189979 + ... + 189984.

It is an arithmetic number, because the mean of its divisors is an integer number (379964).

2^1139889 is an apocalyptic number.

It is an amenable number.

1139889 is a deficient number, since it is larger than the sum of its proper divisors (379967).

1139889 is an equidigital number, since it uses as much as digits as its factorization.

1139889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379966.

The product of its digits is 15552, while the sum is 39.

The square root of 1139889 is about 1067.6558434252. The cubic root of 1139889 is about 104.4610020612.

The spelling of 1139889 in words is "one million, one hundred thirty-nine thousand, eight hundred eighty-nine".